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The present study examined the effects of air pollutants on people’s health, focusing on dust produced from automobile tires while cars drive on roads. The annual volume of dust resulting from tire wear, calculated based on the number of automobiles registered in Japan, was 1747245.4 m3. To put it simply, this translates to approximately 1.4 times the volume of the Tokyo Dome, a famous Japanese baseball stadium. Particulate substances are categorized into three groups depending on their size, and dust resulting from tire wear is classified into the coarse particle mode along with mold spores, pollen, and dust produced from brake pads. This study examined whether or not tire dust causes health damage similarly to pollen, a particulate substance in the same group. There were 38/cm2 dust particles resulting from tire wear on a busy road in Osaka Prefecture, and this number was larger than that of cedar pollen/cm2 (35), a cause of hay fever, identified in Hokkaido. The results suggest that tire dust may also adversely affect the health of people if any of its constituents has a toxicity or causes allergies.
purpose of this study was to use structural equation modeling to examine the
effects of trait rumination and reflection on stress response and subjective
well-being among Japanese university athletes. One hundred and eighty-two
Japanese university athletes (114 males, 68 females, mean age = 20.15 years)
participated. Trait rumination was positively associated with stress response
and negatively associated with subjective well-being. On the other hand, trait
reflection showed a negative association with stress response and a positive
association with subjective well-being. In order to develop effective
interventions for athletes high in rumination and/or low in reflection, future
research should examine the mechanism that explains the different effects of
rumination and reflection on athlete mental health.